---
title: CustomXMLPrefixMapping.NamespaceURI Property (Office)
ms.prod: office
api_name:
- Office.CustomXMLPrefixMapping.NamespaceURI
ms.assetid: f7f26169-3f29-2706-9a29-7e79ad123b53
ms.date: 06/08/2017
---


# CustomXMLPrefixMapping.NamespaceURI Property (Office)

Gets the unique address identifier for the namespace of the  **CustomXMLPrefixMapping** object. Read-only.


## Syntax

 _expression_. **NamespaceURI**

 _expression_ An expression that returns a **CustomXMLPrefixMapping** object.


### Return Value

String


## See also


#### Concepts


[CustomXMLPrefixMapping Object](customxmlprefixmapping-object-office.md)
#### Other resources


[CustomXMLPrefixMapping Object Members](customxmlprefixmapping-members-office.md)

